US4757705A - Plate processing device having guide means for a vertical ram - Google Patents

Plate processing device having guide means for a vertical ram Download PDF

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Publication number
US4757705A
US4757705A US06/860,467 US86046786A US4757705A US 4757705 A US4757705 A US 4757705A US 86046786 A US86046786 A US 86046786A US 4757705 A US4757705 A US 4757705A
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United States
Prior art keywords
ram
shaft
frame
blade
workpiece
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US06/860,467
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English (en)
Inventor
Yoshitaka Arima
Hidekatsu Ikeda
Toshiaki Kunihiro
Chuo Tobita
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Amada Co Ltd
Original Assignee
Amada Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP6683885U external-priority patent/JPH0141537Y2/ja
Priority claimed from JP1985082469U external-priority patent/JPH0314262Y2/ja
Priority claimed from JP1985082468U external-priority patent/JPH0413050Y2/ja
Priority claimed from JP11889285A external-priority patent/JPH0657365B2/ja
Application filed by Amada Co Ltd filed Critical Amada Co Ltd
Assigned to AMADA COMPANY, LIMITED reassignment AMADA COMPANY, LIMITED ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: ARIMA, YOSHITAKA, IKEDA, HIDEKATSU, KUNIHIRO, TOSHIAKI, TOBITA, CHUO
Application granted granted Critical
Publication of US4757705A publication Critical patent/US4757705A/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D33/00—Accessories for shearing machines or shearing devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J13/00—Details of machines for forging, pressing, or hammering
    • B21J13/04—Frames; Guides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D15/00—Shearing machines or shearing devices cutting by blades which move parallel to themselves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D33/00—Accessories for shearing machines or shearing devices
    • B23D33/08—Press-pads; Counter-bases; Hold-down devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D33/00—Accessories for shearing machines or shearing devices
    • B23D33/10—Stops for positioning work
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/748—With work immobilizer
    • Y10T83/7593—Work-stop abutment
    • Y10T83/76—With scale or indicator

Definitions

  • the present invention relates to a device for processing a plate-shaped workpiece, and in particular to a plate processing device provided with a vertically acting ram, such as, for example, a shearing machine, press brake, or press machine.
  • a vertically acting ram such as, for example, a shearing machine, press brake, or press machine.
  • a ram with free vertical movement installed on a commonly known plate processing device such as a shearing machine or a press machine is usually guided in freely reciprocal movement by means of a ram guide mechanism mounted on a frame.
  • This ram guide mechanism generally operates through a gib between a guide member mounted vertically on a frame and the ram.
  • a back gauge device in order to position the workpiece once the trailing edge is reached.
  • this back gauge device is moved away from the workpiece a suitable distance. Accordingly, in a conventional back gauge device, when the end of the workpiece is reached there is no way to buffer the shock, and after the back gauge device is moved away from the work piece, it is not easy to quickly repeat the operation.
  • a first object of the present invention is to provide, with due consideration to the drawbacks of such conventional devices, a plate processing device which is provided with a guide device which guides a ram in vertical operation and is easy to assemble and operate.
  • a guide member which is pressed against a sliding surface of a ram supported so that it may move freely in the vertical direction on a frame.
  • This guide member is provided so that it freely rotates around the centerline of a first verical shaft, and also freely rotates around the centerline of a second shaft parallel to the previously mentioned sliding surface.
  • the guide member is constructed so that it follows the sliding surface of the ram.
  • a second object of the present invention is to provide a plate processing device with which an extremely easy fine adjustment is obtained in the longitudinal direction of the ram.
  • a sliding surface formed on the front side of a ram which is supported so that it may move freely in the vertical direction on a frame, is energized by pressure toward the rear by a guide member positioned at the front of the ram.
  • An upper guide roller which guides the upper vicinity of the back side of the abovementioned ram is supported in a freely rotatable manner on a transverse side frame.
  • a lower guide roller which guides the lower vicinity of the back side of the ram is supported in a freely rotatable manner on both side frames through the an eccentric shaft.
  • a drive device is provided which controls the rotation of the eccentric shaft.
  • a third object of the present invention is to provide a plate processing device equipped with a back gauge device which buffers the shock when the trailing edge of the workpiece is reached and quickly returns to the base position after moving away from the workpiece.
  • a freely-movable threaded rod energized in the foward direction, is provided for moving a back gauge in the longitudinal direction.
  • An operating device is provided to move the threaded rod.
  • a fourth object of the present invention is to provide a plate processing device in which the workpiece is noiselessly secured by pressure to the work table by means of a plate pressuring device.
  • a hydraulic pressure producing device for supplying pressurized hydraulic fluid to a plate pressing device is provided on the plate processing device, along with a first plunger pump section for low pressure high output and a second plunger pump section for high pressure low output.
  • the first plunger pump section is first activated so that the plate pressing device secures the workpiece with light pressure, and then the second plunger pump section is activated to firmly secure the workpiece with high pressure.
  • FIG. 1 is a front elevation, with one section cut away, of a shearing machine showing one embodiment of the plate processing device of the present invention.
  • FIG. 2 is a right side elevation of the shearing machine of FIG. 1.
  • FIG. 3 is a sectional drawing viewed in the direction of the section III--III of FIG. 1.
  • FIG. 4 is a sectional drawing viewed in the direction of the section IV--IV of FIG. 1.
  • FIG. 5 is a sectional drawing viewed in the direction of the section V--V of FIG. 4.
  • FIG. 6 is an expanded secional drawing of the section VI in FIG. 3.
  • FIG. 7 is a circuit drawing giving a general view of a hydraulic pressure generating device which supplies hydraulic fluid to a plate pressurizing device. This drawing also shows the connections between the hydraulic pressure generating device and the plate pressuring device.
  • FIG. 8 is an sectional explanatory drawing of a second embodiment of the hydraulic pressure generating device.
  • the present invention is not limited to a shearing machine but can be implemented in other plate processing devices such as a press break and the like. However, the following embodiments are explained for the case in which a shearing machine is implemented as the plate processing machine of the present invention.
  • a shearing machine 1 is provided with a plurality of side frames 3, 5 erected in parallel on its left and right sides.
  • an upper front plate 7 is provided integrally connected and secured to both left and right ends.
  • both ends of a lower front plate 9 which is erected perpendicularly, are integrally connected and secured to the bottom of the front sides of the side frames 3, 5.
  • the top section on the rear sides of the side frames 3, 5 are integrally connected through a beam member 11 extending in the transverse direction.
  • a work table 13 which supports a plate-shaped workpiece W is provided horizontally on the upper section of the lower front plate 9.
  • a long lower blade 15 is detachably mounted in the transverse direction on the rear section of the work table 13.
  • An upper blade 17 which works in cooperation with the lower blade 15 to shear the workpiece W is mounted at a suitable inclination on a ram 19 provided in a freely elevatable manner in the rear direction of the upper front plate 7.
  • a plurality of long vertical rib members 21 are integrally mounted on the rear surface of both left and right side sections of the ram 19.
  • a plurality of rear upper guide members 23 and a plurality of rear lower guide members 25 are mounted on the rear upper section and the rear lower section of the rib members 21.
  • the left and right rear upper guide members 23 respectively contact a plurality of upper guide rollers 27, and each of the upper guide rollers 27 is supported so that it freely rotates on a supporting shaft 29 supported horizontally on the upper section of the left and right side frames 3, 5.
  • the left and right rear lower guide members 25 respectively contact a plurality of lower guide rollers 31, and each of the lower guide rollers 31 is supported so that it can freely rotate on an eccentric section 33e provided on each of a plurality of eccentric shafts 33 which are supported so that they freely rotate on the lower section of the left and right side frames 3, 5.
  • each arm member of a plurality of arm members 35 is mounted on each of the eccentric shafts 33, in order that the eccentric shafts 33 might rotate.
  • On the tip of each arm member 35 the respective tips of a plurality of connecting rods 39 are connected in a pivotally supported manner through a pin 37.
  • the opposite end of each of the connecting rods 39 is connected in a pivotally supported manner on a tip of one of a plurality of drive arms 41 through a pin 43.
  • the bases of the drive arms 41 are integrally mounted on a single rotary shaft 45 which is supported to freely rotate in the vicinity of both ends of the upper section of the left and right side frames 3, 5.
  • a swinging arm 47 is mounted on one end section of the rotary shaft 45.
  • a threaded rod 51 extending in a direction transverse to a cylindrically-shaped pin nut member 49 is screwed onto the pin nut member 49 which is supported in a freely rotatable manner on the tip of the swinging arm 47.
  • One end of the threaded rod 51 is connected to the output shaft of a drive device 55 through a universal joint 53.
  • the drive device 55 can be a suitable control motor such as a servomotor, which can rotate both forward and in reverse, or a stepping motor, and is mounted on the side frame 3.
  • a suitably shaped dog 57 is mounted on the other end of the rotary shaft 45.
  • a plurality of detection devices 61a, 61b, and 61c supported on a bracket 59 mounted on the side frame 5 are provided in the position corresponding to the dog 57.
  • the detection devices 61a, 61b, and 61c which can be, for example, limit or proximity switches, detect the angle of rotation of the rotary shaft 45 in stages (for example, in eight stages) by simultaneous operation, individually or suitably combined, by means of the dog 57.
  • the detecion devices 61a, 61b, and 61c detect the spacing between the upper blade 17 and the lower blade 15.
  • the rotary shaft 45 is rotated in a suitable direction through the swinging arm 47.
  • the transverse eccentric shaft 33 is rotated in a suitable direction through the drive arms 41, the connecting rod 39, and the arm member 35, so that the lower guide rollers 31, which are supported on the eccentric section 33e of the eccentric shaft 33, can be finely adjusted in the forward and back direction. Therefore, the lower section of the ram 19 can be finely adjusted in the longitudinal direction, and the spacing between the upper blade 17 and the lower blade 15 can be adjusted to conform to the plate thickness of the workpiece W.
  • the detection devices 61a, 61b, and 61c detect the spacing between the upper blade 17 and the lower blade 15, being activated by the dog 57.
  • the spacing between the upper blade 17 and the lower blade 15 can easily be adjusted automatically in a plurality of steps, for example, small, medium, or large, related to the detection devices 61a, 61b, and 61c, by suitably controlling the drive device 55.
  • a plurality of guide devices 63 which always energize the ram 19 by pressure in the rear direction, is provided in the vicinity of the left and right sides of the upper front plate 7.
  • the guide devices 63 are provided on both the left and right side frames 3, 5 to guide the left and right sides of the ram 19.
  • a guide tube 67 is mounted on the upper front plate 7 by means of a plurality of bolts 65.
  • a pressure activated member 69 which penetrates, in a freely sliding menner, a guide hole 7h formed in the upper front plate 7, is engagingly guided in a freely sliding manner in the guide tube 67.
  • the pressure activated member 69 which is almost cylindrical, is always maintained in a uniform direction by means of a guide key 71 which intervenes between the pressure activated member 69 and the guide tube 67.
  • the tip of the pressure activated member 69 points in the direction of the ram 19, and, on that tip, a vertical semicircular concave section 69c is formed which makes an opening in the side of the ram 19.
  • a horizontal penetrating hole 69t which intersects the concave section 69c is also formed.
  • a horizontal rotating pin 73 fits into the penetrating hole 69t in the pressure activated member 69 in a freely rotating manner.
  • This horizontally rotating pin 73 is formed with a semicircular cutout section 73n with a diameter slightly smaller than the concave section 69c in a position corresponding to the concave section 69c in the vertical direction, the cutout section 73n extending across the centerline of the horizontally rotating pin 73.
  • a perpendicularly rotating pin 75 in the shape of a half cylindrical column extended in the vertical direction and positioned within the concave section 69c of the pressure activated member 69 is supported in a freely rotatable manner on the semicircular cutout section 73n of the horizontally rotating pin 73.
  • the diameter of the perpendicularly rotating pin 75 is made larger than the diameter of the cutout section 73n of the horizontally rotating pin 73, and smaller than the diameter of the concave section 69c of the pressure activated member 69.
  • a small diameter constricted section 75c which mates with the cutout section 73n in the horizontally rotation pin 73, is formed in the shape of a groove.
  • a guide member 79 which slides against a sliding surface member 77 mounted on the ram 19, is mounted by a plurality of bolts 81 on the surface where the perpendicularly rotating pin 75 opposes the ram 19.
  • the guide member 79 is provided with a plurality of freely rotating rollers 83, and, in addition, a plurality of wipers 85 are provided on its top and bottom ends.
  • the horizontally rotating pin 73 suitably rotates around its horizontal axis
  • the perpendicularly rotating pin 75 suitably rotates around its perpendicular axis, so that the guide member 79 is guided along the sliding surface of the sliding surface member 77 of the ram 19.
  • the surface contact between the sliding surface member 77 and the guide member 79 is reliably carried out, and good guide operation is obtained.
  • a spring 87 which may be an initially coned disc spring, is provided on the pressure activated member 69 to pressure energize the sliding surface member of the ram 19. Specifically, a comparatively large hole 69h is formed in the base side of the pressure activated member 69.
  • the spring 87 which is supported on a holder pin 89, is accommodated internally in the hole 69h.
  • a head section 89h of the holder pin 89 is mounted in a freely adjustable manner by being screwed onto a cap screw 91.
  • the cap screw 91 is mounted in a freely adjustable manner by being screwed onto a threaded section 67t which is formed on the exterior peripheral surface of the guide tube 67.
  • the cap screw 91 is connected through a suitable number of bolts 95 to a ring nut member 93 which is screwed onto the threaded section 67t.
  • the guide member 79 is always energized by pressure against the sliding surface member 77 of the ram 19 by the action of the spring 87.
  • the configuration of the guide device 63 which is mounted on the left and right side frames 3, 5 which penetrate both the left and right side surfaces of the ram 19, is the same as the configuration of the previously described guide device so that a redundant explanation is not repeated here.
  • the guide member 63 with the abovementioned configuration can be adopted in place of the guide rollers 27, 31.
  • the guide member 79 on the guide device 63 can be modified to the same structure as the guide members 23, 25. This modified guide device, opposing the vertical guide rollers 27, 29, can be mounted on the rear section of the ram 19.
  • an elevation device 97 is provided at the lower position of the ram 19 to elevate the ram 19.
  • the elevating device 97 in this embodiment of the present invention is formed from an eccentric shaft.
  • a drive shaft 99 is positioned at the lower position of the ram 19 with a little offset to the rear of the position directly under the ram 19. Both ends of the drive shaft 99 are supported in a freely rotatable manner by a plurality of bearings 101 mounted on the side frames 3, 5, and the drive shaft 99 is suitably connected to a drive motor 103 mounted on the side frame 3.
  • each of eccentric plates 105 is integrally secured by means of a key 107.
  • the base of a connecting rod 109 engages each eccentric plate 105.
  • the end of each connecting rod 109 is pivotally connected to the bottom section of the rib member 21 through a connecting pin 111.
  • the connecting pin 111 is always positioned above a point C where the lower guide roller 31 and the lower rear guide member 25 make contact.
  • a balance spring or balance cylinder 113 is provided on the rear section of the ram 19 to smoothly elevate the ram 19.
  • the balance cylinder 113 is for weight and balance of the ram 19 and is installed slanting upwardly toward the rear. Its base is supported through a pin 115 on a bracket 117 secured to the beam member 11.
  • the tip of a piston rod 119 provided in a freely reciprocating manner on the balance cylinder 113 is connected to a bracket 121 mounted on the rear section of the beam 19.
  • a back gauge device 123 is mounted on the rear section of the ram 19 to set the shearing dimensions of the workpiece W when the workpiece W is sheared by the upper blade 17 and the lower blade 15. More specifically, a plurality of support bases 125, extending in the rear direction, is mounted near the left and right sides of the rear surface of the ram 19. A plurality of channel members 129, provided with a guide rail on both sides of the lower edge, is mounted horizontally on the lower section of each of the support bases 125. In the inner section of each channel member 129, a lead screw 131 is supported in a freely removably manner.
  • Each lead screw 131 is rotated synchronously by a connecting shaft 135 provided in the transverse direction for connecting a plurality of gear boxes 133, which are provided on the base side of each channel member 129, with a bevel gear and the like inside each gear box 133.
  • each lead screw 131 is connected to the bevel gear in the gear box 133 through a spline, and as will be explained later, each lead screw 131 is provided so that it can move in the longitudinal direction.
  • a nut member 137 is screwed perpendicularly on each lead screw 131, and on each nut member 137 a back gauge carriage 139 is connected through a pin 141.
  • the lower blade 15 and both end sections of a back gauge 145 extended horizontally in the transverse direction are connected to each back gauge carriage 139. Accordingly, because each lead screw 131 is rotating synchronously in the same direction, the back gauge 145 moves suitably in the longitudinal direction, and the shearing dimensions of the workpiece W can be set.
  • a suitable control motor 147 which may be, for example, a servomotor or a stepping motor, is mounted on a single suitable support base 125.
  • An output shaft 149 of this control motor 147 is suitably connected to the lead screws 131.
  • a gear box 151 is mounted on the rear end section of the channel members 129.
  • a shaft 155 of a drive gear 153, supported in a freely rotatable manner on the gear box 151, is connected to the output shaft 149 of the control motor 147 through a universal joint 157.
  • a driven gear 159 which engages the drive gear 153 is integrally mounted on a hollow shaft 161.
  • the rear end section of the lead screw 131, which is slidingly inserted in the hollow shaft 161, and the hollow shaft 161 itself are connected through a key 163 so that they rotate integrally. Accordingly, the lead screw 131 can be rotated by the control motor 147.
  • a threaded section 161t is formed on the rear end section of the hollow shaft 161.
  • a graduated member 165 providing suitable scale graduations, is secured by being screwed onto this threaded section 161t, and a cap nut member 167 is screwed on in a freely adjustable manner.
  • the cap nut 167 and the rear end section of the lead screw 131 are connected through a connecting bolt 169. Accordingly, the lead screw 131 can be slightly adjusted in the longitudinal direction relative to the hollow shaft 161 by tightening the connecting bolt 169 to adjust the screwed position of the cap nut member 167 relative to the hollow shaft 161.
  • the hollow shaft 161 is supported in a freely rotatable manner inside a hollow piston rod 173 through a plurality of bearings 171.
  • a first piston 175 and a second piston 177 are integrally mounted on the outer peripheral surface of the piston rod 173 separated by a suitable difference.
  • the first piston 175 is installed on the piston rod 173 through a nut 179.
  • the first piston 175 is inserted in a freely sliding manner into an air pressure chamber 183 which is formed in a cylinder 181 mounted on the rear end section of the channel member 129. When compressed air is fed into the air pressure chamber 183 the piston rod 173 is pushed to the left, and the lead screw 131 to the front, in FIG. 6.
  • the second piston 177 is integrally formed with the piston rod 173, and is inserted ih a freely sliding manner into a hydraulic chamber 185 formed in the cylinder 181.
  • the piston rod 173 resists the pressure in the air pressure chamber 183 and moves to the right, while the lead screw moves to the rear, in FIG. 6.
  • the stroke of the piston rod 173 is in the range in which the drive gear 153 and the driven gear 159 remain engaged.
  • the support structure on the other end section of the lead screw 131 has no gear for power transmission, but aside from that it is of the same configuration as previously described, so the details will not be explained here again.
  • the lead screw 131 when compressed air is supplied to the air pressure chamber 183 of the cylinder 181, the lead screw 131 is energized and pushed in the forward direction. It neutralizes the shock to the back gauge 145 when the trailing edge of the workpiece W is reached.
  • hydraulic fluid such as pressurized oil is fed into the hydraulic chamber 185 of the cylinder 181
  • the lead screw 131 is moved in the rear direcion, and the back gauge 145 is separated from the trailing edge of the workpiece. Accordingly, when the shearing action occurs, the back gauge 145 is quickly backed off, and after shearing, the reactivation of the return to the base position is accurately and quickly carried out.
  • a plate pressurizing device 187 for securing the workpiece W on the work table 13 by pressure, is provided on the lower section of the upper front plate 7.
  • the plate pressurizing device 187 is provided with a pressure pad for securing the workpiece W by pressure, and, as shown in detail in FIG. 7, in the same way as for a usual plate pressuring device, a piston 187P is provided, constructed in a single-acting cylinder format and equipped with a return spring 189.
  • the plate pressurizing device 187 is of the usual construction so the details will not be explained here. However, the plate pressurizing device 187 is constructed so that its action is related to the cylinder 181 for moving the lead screw 131 in the axial direction.
  • the plate pressurizing device 187 and the hydraulic chamber 185 of the cylinder 181 are connected to a common hydraulic pressure generating device 191.
  • the hydraulic pressure generating device 191 comprises one type of plunger pump.
  • a cylinder block 193 in the hydraulic pressure generating device 191 has a large diameter, low presure, large capacity chamber 195, and a small diameter, high pressure, low capacity chamber 197.
  • the chambers 195 and 197 communicate through a communication orifice 199.
  • the plunger 203 is always energized in the direcion by which it protrudes to the outer direction by means of a spring 205 which may be a coil spring housed in the low pressure high capacity chamber 195.
  • a small diameter plunger 209 which has a cam follower 207 on its outer edge, penetrates the high pressure, low capacity chamber 197 in a freely sliding manner.
  • the plunger 209 is always energized in the direction by which it protrudes to the outer direction by means of a spring 211 in the high pressure, low capacity chamber 197.
  • a detailed drawing has been omitted.
  • the cam shaft 213 are suitably connected to the drive shaft 99 and rotate synchronously with the drive shaft 99 on the elevating device 97, to activate the elevation of the ram 19.
  • the first cam 215, rapidly activates the large diameter plunger 203 through the rotation of the drive shaft, at the same time as the ram 19 first begins its descent from the upper dead point.
  • the second cam 217 causes the small diameter plunger 209 to penetrate the high pressure low capacity chamber 197, and is activated to cause the generation of high pressure hydraulic liquid immediately before the shearing of the workpiece W begins.
  • a suction port 219 on the low pressure, high capacity chamber 195 is connected to an oil tank T through an suction line 223 containing a check valve 221.
  • a safety relief valve 225 is branchingly connected.
  • a discharge port 227 in the low pressure, high capacity chamber 195 is connected to the main fluid line 233 through a connecting line 231 in which is installed a check valve 229.
  • a discharge port 235 on the high pressure low capacity chamber 197 is directly connected to a main hydraulic line 233.
  • the main hydraulic line 233 is connected to the plate pressurizing device 187, and is also connected to the hydraulic chamber 185 of the cylinder 181.
  • the relief valve 237 is branchingly connected to the main hydraulic line 233.
  • the air pressure chamber 183 of the cylinder 181 is connected to an air chamber 241 through a compressed air line 239.
  • the air chamber 241 is suitably connected to a compressed air source 243, and a pressure switch 245 for detection pressure is connected to the air chamber 241.
  • the pressure pad on the plate pressurizing device 187 lightly contacts the workpiece W, so that there is no loud sound of contact and the workpiece W is secured by pressure in a comparatively quiet manner.
  • operating fluid at low pressure is also supplied to the hydraulic chamber 185, and the air pressure in the air pressure chamber 183 causes the piston 175 (177) to be held immobile.
  • the small diameter cylinder 209 is inserted into the high pressure, low capacity chamber 197, utilizing the pressure of the second cam 217.
  • High pressure operating fluid is supplied to the main fluid line 233, and the plate pressurizing device 187 holds the workpiece W strongly on the work table 13.
  • the pressure in the main fluid line 233 is further elevated when the plunger 209 is pressurized by means of the second cam 217.
  • the pressure in the main fluid line 233 is elevated in this manner, the pressure equilibrium between the hydraulic chamber 185 in the cylinder 181 and the air pressure chamber 183 is destroyed and the piston 175 (177), as already explained, acts through the lead screw 131 to push back the back gauge 145.
  • FIG. 8 shows a second embodiment of a pressure generating device.
  • a pressure generating device 247 comprises a cylinder block 251 of a plunger pump 249 and a casing 253 of an oil tank which are integrally secured by bolts or the like. An adequate amount of an oil 255 is filled into the casing 253, into which a low pressure relief valve 257 and a high pressure relief valve 259 are built.
  • a large diameter, low capacity chamber 261 provided with an outlet port 261P is formed in the cylinder block 251 in the plunger pump 249.
  • a small diameter, high pressure low capacity chamber 263, provided with a discharge port 263P is formed coaxially with the bottom section of the low pressure, high capacity chamber 261.
  • a large diameter plunger 265 penetrates in a freely sliding manner into the low pressure, high capacity chamber 261.
  • a small diameter plunger 267 is formed so that it engages in a freely separable manner the high pressure low capacity chamber 263 on the inner end of the plunger 265.
  • a return spring 269 is fitted between the large diameter plunger 265 and the bottom section of the low pressure, high capacity chamber 261. The plunger 265 is always energized toward the outside.
  • a swinging lever 273 is provided on which is installed a roller 271 joined to the outer end of the plunger 265.
  • the base section of swinging lever 273 is pivotally supported through a pivot 277 on a bracket 275 provided on the casing 253.
  • the roller 271 is installed near the tip of the swinging lever 273.
  • a cam follower 279 is mounted in a freely rotating manner on the tip of the swinging lever 273.
  • the cam follower 279 contacts, in a freely rotatable manner, the periphery of a suitably-formed cam 283 integrally mounted on a cam shaft 281.
  • the plunger 265 is caused to slide by the suitable rotation of the cam shaft 281. While the plunger 265 is opposed by the resistance of the return spring 269, a suitable volume of the operating fluid is discharged from the low pressure high capacity chamber 261. Then, the small diameter plunger 26 is caused to penetrate into the high pressure, low capacity chamber 263, and high pressure operating fluid is discharged from the high pressure, low capacity chamber 263.
  • the low pressure relief valve 257 and the high pressure relief valve 259 are mounted, through a plurality of bolts, on a support block 285 formed in the casing 253.
  • a connecting chamber 289 is formed in the low pressure relief valve 257 and is connected to the outlet port 261P of the low pressure, high capacity chamber 261 through a communication orifice 287 which is formed in the support block 285.
  • a check valve 295 is provided which comprises a ball 291, which only allows suction of the oil 255 from inside the casing 253, and a spring 293.
  • a ball 297 and a spring 299 are provided to allow the operating fluid to escape when the pressure in the connecting chamber 289 goes above a prescribed pressure.
  • the energization of the spring 299 is freely adjustable by means of an adjusting bolt 301 which is screwed into the casing 253. Further, the relief valve 257 is constructed in the same manner as a normal relief valve so a more detailed explanation is omitted.
  • the high pressure relief valve 259 is connected to the discharge port 263P of the high pressure, low capacity chamber 263 through a communication orifice 303, and is also connected to the plate pressurizing device 187.
  • the structure of the high pressure relief valve 259 is the same as that of the low pressure relief valve 257, with the exception of the check valve 295, so that the structural members which perform the same functions bear the same identifying numbers. A more detailed explanation is therefore omitted.
  • the plunger pump 249 and the oil tank casing 253 are integrally constructed, and the relief valves 257, 259 are built into the casing 253, so that the overall construction has been made compact.
  • This structure can be handled as a single unit, and both assembly and handling are easy.
  • the large diameter plunger 265 and the small diameter plunger 267 in the plunger pump 249 are integrally formed so that both the manufacture and assembly are simple.
  • the guide member of the guide device follows the sliding surface of the freely elevatable ram on the plate processing device of the present invention, and the guiding action can be performed through a comparatively simple construction.
  • the guide member follows the sliding surface, highly precise processing is unnecessary, and comparatively simple processing and assembly is obtained.
  • the spacing between the upper blade and the lower blade can be automatically adjusted very easily.
  • the separation of the back gauge from the trailing edge of the workpiece can be speedily performed, and the back gauge can be quickly and accurately returned to its original position.
  • a plate pressurizing device secures the unsheared material on a table by pressure. Initially, a pressure pad contacts the workpiece with high capacity and low pressure. After, the pressure pad secures the workpiece to the table with low capacity and high pressure so that no noise is produced. In addition, the plate material is accurately secured.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Press Drives And Press Lines (AREA)
  • Shearing Machines (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Punching Or Piercing (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Details Of Cutting Devices (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
US06/860,467 1985-05-08 1986-05-07 Plate processing device having guide means for a vertical ram Expired - Fee Related US4757705A (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP60-66838[U] 1985-05-08
JP6683885U JPH0141537Y2 (it) 1985-05-08 1985-05-08
JP60-82468[U]JPX 1985-06-03
JP1985082469U JPH0314262Y2 (it) 1985-06-03 1985-06-03
JP1985082468U JPH0413050Y2 (it) 1985-06-03 1985-06-03
JP11889285A JPH0657365B2 (ja) 1985-06-03 1985-06-03 板材加工機のラム案内装置

Publications (1)

Publication Number Publication Date
US4757705A true US4757705A (en) 1988-07-19

Family

ID=27464776

Family Applications (1)

Application Number Title Priority Date Filing Date
US06/860,467 Expired - Fee Related US4757705A (en) 1985-05-08 1986-05-07 Plate processing device having guide means for a vertical ram

Country Status (10)

Country Link
US (1) US4757705A (it)
KR (1) KR930001085B1 (it)
AU (1) AU581311B2 (it)
CA (1) CA1298142C (it)
CH (1) CH671354A5 (it)
DE (1) DE3615381C2 (it)
FR (1) FR2581573B1 (it)
GB (2) GB2177960B (it)
IT (1) IT1204342B (it)
SE (1) SE463962B (it)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5062333A (en) * 1987-08-03 1991-11-05 Amada Company, Limited Shearing machine
US5195414A (en) * 1987-08-03 1993-03-23 Amada Company, Ltd. Shearing machine
US5852964A (en) * 1996-10-02 1998-12-29 Murata Kikai Kabushiki Kaisha Safety mechanism for right angle shear
US20030033845A1 (en) * 2001-05-24 2003-02-20 John Forlow Bending brake machine
US20120090482A1 (en) * 2010-10-19 2012-04-19 Aida Engineering, Ltd. Press load controlling apparatus for mechanical press
CN104259549A (zh) * 2014-07-28 2015-01-07 登电集团铝加工有限公司 铝带分切机下刀轴锁紧装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4031737A (en) * 1975-01-24 1977-06-28 Promecam Sisson-Lehmann Machine tool apron guiding system
US4331020A (en) * 1979-07-05 1982-05-25 Promecam Sisson-Lehmann Dimension indicator for sheet-metal folding or shearing machine tools
US4558582A (en) * 1982-10-13 1985-12-17 Manfred Meinig Apparatus for flanging ventilation duct walls

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1267945B (de) * 1962-05-23 1968-05-09 Schloemann Ag Vorrichtung zum Einstellen und Nachstellen der Messer von Metallscheren, insbesondere von schweren maschinell angetriebenen Blechscheren
FR1404670A (fr) * 1964-05-21 1965-07-02 Perfectionnement aux presses, presses-plieuses, cisailles-guillotines ou autres
US3371569A (en) * 1965-06-28 1968-03-05 Pacific Press & Shear Corp Shear machine or the like
US4507997A (en) * 1981-01-30 1985-04-02 Amada Company, Limited Shearing machine
CA1258816A (en) * 1983-11-09 1989-08-29 Amada Company, Limited Shearing machine
SE455679B (sv) * 1984-04-09 1988-08-01 Amada Co Ltd Anslagsanordning for legesinstellning av ett arbetsstycke

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4031737A (en) * 1975-01-24 1977-06-28 Promecam Sisson-Lehmann Machine tool apron guiding system
US4331020A (en) * 1979-07-05 1982-05-25 Promecam Sisson-Lehmann Dimension indicator for sheet-metal folding or shearing machine tools
US4558582A (en) * 1982-10-13 1985-12-17 Manfred Meinig Apparatus for flanging ventilation duct walls

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5062333A (en) * 1987-08-03 1991-11-05 Amada Company, Limited Shearing machine
US5195414A (en) * 1987-08-03 1993-03-23 Amada Company, Ltd. Shearing machine
US5852964A (en) * 1996-10-02 1998-12-29 Murata Kikai Kabushiki Kaisha Safety mechanism for right angle shear
US20030033845A1 (en) * 2001-05-24 2003-02-20 John Forlow Bending brake machine
US20120090482A1 (en) * 2010-10-19 2012-04-19 Aida Engineering, Ltd. Press load controlling apparatus for mechanical press
US8915181B2 (en) * 2010-10-19 2014-12-23 Aida Engineering, Ltd. Press load controlling apparatus for mechanical press
CN104259549A (zh) * 2014-07-28 2015-01-07 登电集团铝加工有限公司 铝带分切机下刀轴锁紧装置

Also Published As

Publication number Publication date
AU581311B2 (en) 1989-02-16
DE3615381C2 (de) 1992-07-16
GB8810303D0 (en) 1988-06-02
IT8620358A0 (it) 1986-05-08
SE8602104L (sv) 1986-11-09
GB8611103D0 (en) 1986-06-11
CA1298142C (en) 1992-03-31
CH671354A5 (de) 1989-08-31
KR870000112A (ko) 1987-02-16
FR2581573A1 (fr) 1986-11-14
SE463962B (sv) 1991-02-18
GB2208621B (en) 1989-07-26
GB2208621A (en) 1989-04-12
SE8602104D0 (sv) 1986-05-07
DE3615381A1 (de) 1987-01-02
FR2581573B1 (fr) 1993-09-24
GB2177960A (en) 1987-02-04
GB2177960B (en) 1989-08-31
KR930001085B1 (ko) 1993-02-15
IT1204342B (it) 1989-03-01
AU5720786A (en) 1986-11-13

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